Add insert placeholder

src/main/scala/minisql/Quoted.scala

@@ -24,9 +24,33 @@ opaque type Quoted <: Ast = Ast
 
 opaque type Query[E] <: Quoted = Quoted
 
+opaque type Action[E] <: Quoted = Quoted
+
+opaque type Insert <: Action[Long] = Quoted
+
+object Query {
+
+  extension [E](inline e: Query[E]) {
+
+    inline def map[E1](inline f: E => E1): Query[E1] = {
+      transform(e)(f)(Map.apply)
+    }
+
+    inline def filter(inline f: E => Boolean): Query[E] = {
+      transform(e)(f)(Filter.apply)
+    }
+
+    inline def withFilter(inline f: E => Boolean): Query[E] = {
+      transform(e)(f)(Filter.apply)
+    }
+
+  }
+}
+
 opaque type EntityQuery[E] <: Query[E] = Query[E]
 
 object EntityQuery {
+
   extension [E](inline e: EntityQuery[E]) {
 
     inline def map[E1](inline f: E => E1): EntityQuery[E1] = {
@@ -37,6 +61,10 @@ object EntityQuery {
       transform(e)(f)(Filter.apply)
     }
 
+    inline def insert(v: E)(using m: Mirror.ProductOf[E]): Insert = {
+      ???
+    }
+
   }
 }